Low density polyvinyl chloride microparticles
US12234353B2 · kind B2 · utility
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12References
18Claims
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Key dates
| Filing date | Sep 15, 2021 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Sep 1, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Hollow microparticles of polyvinyl chloride are disclosed, having low volumetric densities useful for reducing mass per unit volume of polymer or inorganic articles and apparatus having such microparticles compounded into thermoplastic or thermoset polymers. A double emulsion polymerization process is also disclosed as the process to produce the hollow microparticles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.